CN114690324A

CN114690324A - Wave combining module and optical assembly

Info

Publication number: CN114690324A
Application number: CN202011641799.4A
Authority: CN
Inventors: 邱晓东; 陈华; 黄利新
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2022-07-01
Anticipated expiration: 2040-12-31
Also published as: CN114690324B; WO2022143001A1

Abstract

The embodiment of the invention provides a wave combining module and an optical assembly, which can freely change the polarization direction of an optical signal emitted from TO, so that the aim of combining waves based on the polarization direction of the optical signal is fulfilled. The wave combining module comprises a first rotating ring with a first through groove, the first through groove is used for inserting a first transistor outline TO, the wave combining module further comprises a wave combining tube, the wave combining tube is further communicated with a second through groove, a second optical signal transmitted along a second transmission direction is used for being transmitted into the wave combining tube through the second through groove, and when the first TO rotates TO different rotating positions relative TO the first through groove, the first optical signal emitted from the first TO has different polarization directions; the first polarization direction of the first optical signal and the second polarization direction of the second optical signal are different from each other.

Description

Wave combining module and optical assembly

Technical Field

The application relates to the technical field of optical communication, in particular to a wave combining module and an optical assembly.

Background

In recent years, Passive Optical Networks (PONs) have begun to be upgraded from gigabit-capable passive optical networks (GPONs) to higher-speed networks, such as 10 GPON. In the generation process, smooth evolution to 10GPON needs to be performed on the basis of the GPON, that is, the 10GPON optical module is required to be compatible with the GPON. Therefore, the optical module needs to have 10GPON transmission and GPON transmission at the same time, which requires that the optical module can combine two paths of transmission light.

Currently, an optical module may use a polarizing Plate (PBC) for combining, as shown in fig. 1, a first optical signal 101 is transmitted to a polarizing plate 100, a second optical signal 102 is transmitted to the polarizing plate 100, in order to combine the first optical signal 101 and the second optical signal 102, the polarizing direction 111 of the first optical signal 101 and the polarizing direction 112 of the second optical signal 102 are perpendicular to each other, so that the first optical signal 101 is transmitted at the polarizing plate 100, the second optical signal 102 is reflected at the polarizing plate 100, and the transmitted first optical signal 101 and the reflected second optical signal 102 exiting from the polarizing plate 100 are combined into a light signal 104 to be coupled to an optical fiber 103. To ensure that the polarization direction 111 of the first optical signal 101 is perpendicular to the polarization direction 112 of the second optical signal 102, the polarization direction 111 of the first optical signal 101 needs to be adjusted by the polarization control element 105, and the polarization direction 112 of the second optical signal 102 needs to be adjusted by the polarization control element 106.

Therefore, the polarization control element is used for adjusting the polarization direction of the optical signal, so that the structure of the optical module is complex, the size of the optical module cannot be reduced, and the cost of the optical module is increased.

Disclosure of Invention

The embodiment of the invention provides a wave combining module and an optical assembly, which can freely change the polarization direction of an optical signal emitted from a TO (total optical TO fiber), thereby achieving the purpose of combining waves based on the polarization direction of the optical signal.

A first aspect of an embodiment of the present invention provides a wave combining module, including a first rotating ring having a first through groove, where the first through groove is used TO insert a first transistor outline TO, the first TO is used TO emit a first optical signal transmitted along a first transmission direction, the first through groove extends along the first transmission direction, the wave combining module further includes a wave combining tube communicated with the first through groove, the wave combining tube is further communicated with a second through groove, a second optical signal transmitted along a second transmission direction is used TO be transmitted into the wave combining tube via the second through groove, and the second through groove extends along the second transmission direction; a first gap exists between the first through groove and the first TO, and the first gap is used for enabling the first TO rotate TO different rotation positions relative TO the first through groove, and when the first TO rotates TO different rotation positions relative TO the first through groove, the first optical signal emitted by the first TO has different polarization directions; wherein a first polarization direction of the first optical signal is different from a second polarization direction of the second optical signal, the first polarization direction is a polarization direction of the first optical signal when the first TO rotates TO a first target position within the first through slot, and the first target position is one of a plurality of different rotational positions at which the first TO relatively rotates with respect TO the first through slot; the optical combiner further includes a first optical filter located at a position where the first transmission direction and the second transmission direction intersect, where the first optical filter is configured to filter the first optical signal to output a filtered first optical signal, where the first optical filter is configured to filter the second optical signal to output a filtered second optical signal, where the filtered first optical signal has the first polarization direction, the filtered second optical signal has the second polarization direction, and the filtered first optical signal and the filtered second optical signal are transmitted along the same transmission direction.

It can be seen that the first polarization direction of the first optical signal can be changed by rotating the first TO in this aspect, so as TO ensure that the first polarization direction and the second polarization direction can be different from each other, and the first optical filter can multiplex the first optical signal and the second optical signal based on the polarization directions. Because the wave combination is carried out based on the polarization direction, the wavelength of the first optical signal and the wavelength of the second optical signal are not required, namely, the interval between the wavelength of the first optical signal and the wavelength of the second optical signal can be very small or even the same, the application scene of the optical assembly is improved, the insertion loss in the wave combination process can be reduced, the performance of the optical assembly is improved, in the wave combination process, a polarization control element for changing the polarization direction is not required to be added, the complexity and the size of the structure of the optical assembly are effectively reduced, the process difficulty of manufacturing the optical assembly is reduced, the efficiency of producing the optical assembly is improved, and the cost is reduced.

Based on the first aspect, in an optional implementation manner, the first TO includes a TO base and a TO pipe cap covering the TO base, a laser device used for emitting the first optical signal is fixedly disposed on the TO base, the TO pipe cap is provided with a lens, and the first optical signal emitted by the laser device is transmitted TO the wave combining pipe through the lens; the TO pipe cap is inserted into the first through groove and used for rotating in the first through groove; the external surface of the TO base is provided with a first indicator label, the external surface of the first rotating ring is provided with at least one second indicator label, and the first optical signal emitted from the lens has different polarization directions under the condition that the first indicator label is aligned with the different second indicator label; wherein the first target position is a position where the first indicator tab is aligned with a target second indicator tab, the target second indicator tab being one of the at least one second indicator tab.

Therefore, the purpose of accurately adjusting the first polarization direction and/or the second polarization direction can be achieved by aligning the first indicating label with the second indicating label, and in the process of specifically applying the optical component shown in the aspect, the first polarization direction and/or the second polarization direction can be freely and accurately adjusted according to the requirement of wave combination of transmitted optical signals.

Based on the first aspect, in an optional implementation manner, the target second indication label is an angle value, and the angle value is an angle of an included angle between the first polarization direction and a polarization direction of the first optical filter when the first indication label is aligned with the target second indication label.

Therefore, the accuracy of adjusting the first polarization direction can be effectively improved under the condition that the second indication label is the angle value.

In an optional implementation manner, in a radial direction of the first TO, the cross-sectional area of the first through groove is greater than or equal TO that of the TO base, the first indication label is located on a first surface of the TO base, which faces away from the lens, and the second indication label is located on a second surface of the first rotating ring; the first rotating ring is provided with the second surface and a third surface, the outer peripheral surface of the first rotating ring is formed between the second surface and the third surface, the second surface comprises a first notch of the first through groove, the third surface comprises a second notch of the first through groove, and the first notch and the second notch are communicated, wherein the second notch is communicated with the wave combining pipe, and the TO pipe cap is used for being inserted into the first through groove through the first notch; the first target position is a position where the first indicator tab is aligned with the target second indicator tab in a radial direction of the first TO.

Based on the first aspect, in an optional implementation manner, in a radial direction of the first TO, a cross-sectional area of the first through groove is smaller than a cross-sectional area of the TO base, and in a state where the TO cap is inserted into the first through groove, the TO base is fixed TO a notch of the first through groove, which is far away from the wave combining tube, in a clamping manner; the side wall of the TO base is provided with the first indicating label, and the peripheral wall of the first rotating ring is provided with the at least one second indicating label; the first target position is a position where the first indicator tab is aligned with the target second indicator tab along an axial direction of the first TO.

Based on the first aspect, in an optional implementation manner, a sliding groove is concavely formed in the inner peripheral wall of the first rotating ring, a convex rail is convexly formed on the outer peripheral wall of the TO pipe cap included in the first TO, the convex rail is inserted into the sliding groove, and the convex rail is used for sliding along the guide of the sliding groove.

It can be seen that, because of the limiting effect of the sliding groove on the protruding rail along the axial direction of the first TO, the first TO is effectively prevented from being separated from the first rotating ring, and the stability of the optical assembly structure is improved.

Based on the first aspect, in an optional implementation manner, the sliding groove is concavely provided with at least one clamping groove, the convex rail is convexly provided with an elastic arm, when the TO pipe cap slides TO the first target position, the elastic arm is clamped and fixed in a target clamping groove, and the target clamping groove is one of the at least one clamping groove.

Therefore, under the condition that the elastic arm is clamped and fixed in the target clamping groove, even if the optical assembly shakes, the elastic arm cannot be separated from the target clamping groove, so that the first polarization direction of the first optical signal cannot be changed, and the state that the first polarization direction is parallel to the polarization direction of the first optical filter can be always ensured. And the second polarization direction of the second optical signal can not be changed, and the state that the second polarization direction is vertical to the polarization direction of the first optical filter can be always ensured.

Based on the first aspect, in an optional implementation manner, the concave of the protruding rail forms a first groove, a notch of the first groove is opposite to the groove arm of the sliding groove to form an accommodating space, the accommodating space includes at least one ball, and the ball abuts against the first groove and the groove arm of the sliding groove simultaneously in a state that the protruding rail slides along the guide of the sliding groove.

Therefore, due TO the sliding action of the balls, the efficiency of relative rotation between the first rotating ring and the first rotating ring is improved, and the efficiency of adjusting the first polarization direction of the first optical signal emitted from the first TO is improved.

Based on the first aspect, in an optional implementation manner, along the radial direction of the first TO, the cross section of the TO pipe cap is of a circular structure, the cross section of the first through groove is of a circular structure, and the TO pipe cap and the first through groove are coaxially arranged.

Based on the first aspect, in an optional implementation manner, the wave combining module further includes a second rotating ring having a second through slot, where the second through slot is used TO insert a second TO, and the second TO is used TO emit the second optical signal; a second gap exists between the second through slot and the second TO, and the second gap is used for enabling the second TO rotate relatively TO different rotation positions relative TO the second through slot, and when the second TO rotates TO different rotation positions relative TO the second through slot, the second optical signal emitted by the second TO has different polarization directions; wherein the second polarization direction is a polarization direction of the second optical signal when the second TO rotates TO a second target position within the second through-slot, and the second target position is one of a plurality of different rotational positions relative TO the second TO relative TO the second through-slot.

In an optional implementation manner based on the first aspect, the second through-groove is respectively communicated with a third rotating ring and a fourth rotating ring, the third rotating ring is provided with a third through-groove for inserting a third TO, the fourth rotating ring is provided with a fourth through-groove for inserting a fourth TO, a third gap is formed between the third through-groove and the peripheral wall of the third TO, the third gap is used for enabling the third TO relatively rotate TO a different rotation position relative TO the third through-groove, a fourth gap is formed between the fourth through-groove and the fourth TO, and the fourth gap is used for enabling the fourth TO relatively rotate TO a different rotation position relative TO the fourth through-groove; the second through groove further includes a second optical filter, the second optical filter is located at a position where a transmission direction of a third optical signal and a transmission direction of a fourth optical signal intersect, the third optical signal is an optical signal emitted from the third TO, the fourth optical signal is an optical signal emitted from the fourth TO, and the third optical signal and the fourth optical signal filtered by the second optical filter are combined TO form the second optical signal.

Based on the first aspect, in an optional implementation manner, the first polarization direction is perpendicular to the second polarization direction, the first polarization direction is parallel to a polarization direction of the first optical filter, the first optical signal is transmitted through the first optical filter to output the filtered first optical signal, the second polarization direction is perpendicular to the polarization direction of the first optical filter, and the second optical signal is reflected through the first optical filter to output the filtered second optical signal.

It can be seen that, in the case where the first polarization direction and the second polarization direction are perpendicular, the coupling efficiency of the optical signal to the optical fiber is improved.

Based on the first aspect, in an optional implementation manner, an extending direction of the first through groove is perpendicular to an extending direction of the second through groove.

Based on the first aspect, in an optional implementation manner, an included angle between the first polarization direction and the polarization direction of the first optical filter is within a first preset range, and an included angle between the second polarization direction and the polarization direction of the first optical filter is within a second preset range.

A second aspect of an embodiment of the present invention provides an optical assembly, where the optical assembly includes the wave combining module shown in any one of the first aspects, and the optical assembly further includes the first TO inserted in the first through slot included in the wave combining module.

Drawings

Fig. 1 is a diagram illustrating a wave combining process of an optical module according to the prior art;

fig. 2 is a diagram illustrating an exemplary network architecture of an embodiment of a passive optical network provided herein;

FIG. 3 is a diagram illustrating an exemplary structure of an optical assembly according to one embodiment of the present disclosure;

FIG. 4 is a cross-sectional view of an exemplary embodiment of an optical assembly provided herein;

fig. 5 is a structural example diagram of an embodiment of a wave combining module provided in the present application;

fig. 6 is a cross-sectional view of an embodiment of a wave combining module according to the present disclosure

FIG. 7 is a diagram illustrating an example structure of a TO as provided herein;

FIG. 8 is a diagram illustrating an example of a partial structure of a TO according TO an embodiment of the present application;

FIG. 9 is a cross-sectional view of an example of a TO as provided herein;

FIG. 10 is a diagram illustrating an example of a scenario of optical signal transmission directions and polarization directions provided herein;

FIG. 11 is a diagram illustrating an exemplary structure of an output optical signal of a laser according to an embodiment of the present disclosure;

FIG. 12 is a diagram illustrating an exemplary polarization adjustment for an optical signal emitted from a laser according to the present disclosure;

FIG. 12a is a diagram illustrating an exemplary adjustment of polarization direction of an optical signal emitted from a laser according to the present disclosure;

FIG. 12b is a diagram illustrating another exemplary adjustment of the polarization direction of the optical signal emitted from the laser provided in the present application;

fig. 13 is a diagram illustrating an example of a multiplexing process for a first optical signal and a second optical signal provided herein;

fig. 14 is a view showing a configuration example of the first rotating ring and the first TO in the second embodiment provided in the present application;

fig. 15 is a view showing a configuration example of the first rotating ring and the first TO in the third embodiment, which is provided in the present application;

fig. 16 is a view showing a configuration example of the first rotating ring and the first TO provided in the present application in a fourth embodiment;

fig. 17 is a top view structural example diagram of the first rotating ring and the first TO in the fourth embodiment, provided by the present application;

fig. 18 is a diagram showing another example of the structure of the first rotating ring and the first TO in the fourth embodiment;

fig. 19 is a sectional view showing an example of the first rotating ring and the first TO in one of the fourth embodiment.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terms "first," "second," and the like in the description and claims of this application and the above-described drawings are used herein to describe various elements, but these elements may not be limited to these terms. These terms are only used to distinguish one element from another. For example, a "first" signal may refer to a second signal, and similarly, a "second" signal may refer to a first signal without departing from the teachings of the present disclosure.

In order to better understand the optical component provided in the present application, a PON applied to the optical component shown in the present application is described below with reference to fig. 2, where fig. 2 is an exemplary diagram of a network architecture of an embodiment of a passive optical network provided in the present application.

As shown in fig. 2, a PON200 provided by the present application includes an Optical Line Terminal (OLT) 201, an Optical Distribution Network (ODN) 202, and a plurality of Optical Network Units (ONUs) 203.

The OLT201 may serve as an intermediary between the other network and the ONUs 203, and the OLT201 can forward data received from the other network to the ONUs 203 and forward data received from the ONUs 203 to the other network.

The ONUs 203 may be any devices configured to communicate with the OLT201 and client equipment (not shown). In particular, the ONU203 may act as an intermediary between the OLT201 and the client device, since the ONU203 forwards data received from the OLT201 to the client device and forwards data received from the client device to the OLT 201. In some embodiments, ONU203 is similar to an Optical Network Terminal (ONT), and thus the term is used interchangeably herein.

The ODN202 is a data distribution system that includes fiber optic cables, couplers, splitters, distributors, and/or other devices known to those of ordinary skill in the art. In embodiments, the optical cables, couplers, splitters, distributors, and/or other devices known to those of ordinary skill in the art are passive optical components. In particular, the optical cables, couplers, splitters, distributors, and/or other devices known to those of ordinary skill in the art may be components that do not require any power to distribute data signals between the OLT201 and the ONUs 203.

The ONU203 or the OLT201 includes therein an optical component shown herein, which includes a plurality of transmission Transistor Outlines (TOs), each TO for transmitting an optical signal, e.g., an optical signal emitted by the TO included in the OLT201 is transmitted TO the ONU 203. The optical component comprises one or more receiving TOs comprising a photodiode for receiving optical signals from the opposite side, e.g. the receiving TO comprised by the ONU203 receives optical signals from the OLT 201.

The structure of the optical assembly provided in the present application is exemplified below with reference to a number of embodiments:

the first embodiment is as follows:

fig. 3 to fig. 6 are combined to illustrate a structure of an optical assembly provided in this embodiment, where fig. 3 is an exemplary structure diagram of an embodiment of the optical assembly provided in this application, fig. 4 is an exemplary cross-sectional structure diagram of an embodiment of the optical assembly provided in this application, fig. 5 is an exemplary structure diagram of an embodiment of a combining module provided in this application, and fig. 6 is an exemplary cross-sectional structure diagram of an embodiment of a combining module provided in this application.

The light assembly 300 shown in the present embodiment includes a wave combining module 500, and the wave combining module 500 shown in the present embodiment includes a first rotating ring 501, the first rotating ring 501 has a first through slot 502, and the first through slot 502 forms an accommodating space 503.

The optical assembly 300 further includes a first TO301, the first TO301 shown in this embodiment is a transmitting TO for emitting an optical signal, the first through slot 502 is used for inserting the first TO301, and this embodiment is exemplarily described by setting the first TO301 TO be inserted into the accommodating space 503.

The structure of the first TO in this embodiment is described below with reference TO fig. 7 TO 9, where fig. 7 is a structural example of an embodiment of the TO provided by this application, fig. 8 is a partial structural example of an embodiment of the TO provided by this application, and fig. 9 is a cross-sectional structural example of an embodiment of the TO provided by this application.

The first TO301 in the embodiment comprises a TO pipe cap 601 and a TO base 602, wherein the TO pipe cap 601 is covered on the TO base 602. A laser 603 for emitting a first optical signal is fixedly arranged on the TO base 602, and thus, the laser 603 is accommodated in the TO cap 601.

TO ensure that the first optical signal emitted from the laser 603 can be converged TO be emitted from the TO cap 601, thereby improving the efficiency of coupling the first optical signal emitted from the TO cap 601 TO the optical fiber, the TO cap 601 is provided with a lens 604, and the lens 604 is arranged on the optical path of the first optical signal, so that the first optical signal converged by the lens 604 is emitted from the first TO 301.

The present embodiment does not limit the specific lens type of the lens 604, as long as the first optical signal emitted from the lens 604 is the convergent light, for example, the lens 604 may be a ball lens or a non-ball lens.

The first optical signal emitted from the laser 603 shown in this embodiment is transmitted along a first transmission direction, which can be referred to as a Z-axis direction shown in fig. 7, and can also be referred to as a direction indicated by an arrow 901 shown in fig. 9.

Specifically, in this embodiment, in order TO ensure that the first optical signal can be transmitted along the first transmission direction, the first through groove 502 shown in this embodiment extends along the first transmission direction, and it is apparent that, under the condition that the first TO301 is inserted into the first through groove 502, the first TO301 can emit the first optical signal transmitted along the first transmission direction.

The optical assembly shown in this embodiment further includes a second rotating ring 504, and for the description of the structure of the second rotating ring 504, please refer to the description of the structure of the first rotating ring 501, which is not described in detail. In the second rotating ring 504 shown in this embodiment, a second TO505 is inserted as the transmitting TO, and for the description of the structure of the second TO505, please refer TO the description of the structure of the first TO301 in detail, which is not described in detail in this embodiment.

The optical module shown in this embodiment is capable of multiplexing a first optical signal emitted from the first TO301 and a second optical signal emitted from the second TO505, and in order TO realize multiplexing, a first polarization direction of the first optical signal emitted from the first TO301 and a second polarization direction of the second optical signal emitted from the second TO505 need TO be different from each other.

In this embodiment, in order TO ensure that a first polarization direction of a first optical signal emitted from the first TO301 and a second polarization direction of a second optical signal emitted from the second TO505 are different from each other, the optical module in this embodiment can freely adjust the first polarization direction of the first optical signal emitted from the first TO, and/or can freely adjust the second polarization direction of the second optical signal emitted from the second TO, so as TO ensure that the first polarization direction and the second polarization direction are different from each other, thereby successfully ensuring the combined wave of the first optical signal and the second optical signal.

The following description will take the first TO301 as an example TO illustrate an exemplary process of adjusting the first polarization direction of the first optical signal emitted from the first TO 301:

for better understanding, the first polarization direction is described below with reference to fig. 10 and 11:

the present embodiment does not limit the specific type of the laser 603, for example, the type of the laser 603 may be any one of the following examples:

a Distributed Feedback (DFB) laser, an electroabsorption modulated (EAM) laser, or a Laser Diode (LD).

The first optical signal emitted by the laser 603 shown in this embodiment is linearly polarized light, as shown in fig. 10, the transmission direction of the first optical signal emitted by the laser 603 is transmitted along the Z axis, for example, at time t1, the first polarization direction of the first optical signal is 1001, at time t2, the first polarization direction of the first optical signal is 1002, the first polarization direction is 1001 and the first polarization direction is 1002 are located in the same plane perpendicular to the transmission direction of the first optical signal, and as shown in this embodiment, at time t1 and time t2 are any two different times during the transmission of the first optical signal, it can be seen that the first polarization direction of the first optical signal is perpendicular to the first transmission direction Z of the first optical signal.

As shown in fig. 11, a first transmission direction of a first optical signal emitted from a laser 603 is 1101, and a first polarization direction 1102 of the first optical signal is perpendicular to the first transmission direction 1101.

Therefore, if the first polarization direction of the first optical signal needs to be adjusted, the first polarization direction of the first optical signal can be adjusted by adjusting the first transmission direction of the first optical signal. For example, as shown in fig. 12, fig. 12 is a diagram illustrating an example of polarization adjustment of an optical signal emitted from a laser according to the present application.

As shown in fig. 12a, a first polarization direction 1201 of the first optical signal emitted by the laser 603 is perpendicular TO the first transmission direction 1202, that is, the first polarization direction 1201 is parallel TO the paper surface, and in order TO adjust the first polarization direction, the first TO301 can be rotated along the Z axis, so that the first TO301 is rotated TO the position shown in fig. 12b, and when the first TO301 is at the position shown in fig. 12b, the polarization direction 1203 of the first optical signal emitted by the laser 603 is perpendicular TO the paper surface.

As can be seen from the above description, the laser 603 shown in this embodiment is fixed on the TO base of the first TO301, so that the first transmission direction of the first optical signal emitted by the laser 603 can be changed by rotating the first TO301, and further, the first polarization direction of the first optical signal can be changed.

How the optical module shown in this embodiment can freely rotate the first TO301 will be described below:

in the radial direction of the first TO301, the cross section of the TO pipe cap 601 is of a circular structure, the cross section of the first through groove 502 is of a circular structure, the TO pipe cap 601 and the first through groove 502 are coaxially arranged, when the TO pipe cap 601 is inserted into the first through groove 502, the diameter of the first through groove 502 is larger than that of the TO pipe cap 601, so that the TO pipe cap 601 can be inserted into the first through groove 502, and the TO pipe cap 601 can rotate around the axis of the first through groove 502.

A first gap 902 (as shown in fig. 9) exists between an inner peripheral wall of the first through groove 502 and an outer peripheral wall of the TO cap 601 in the present embodiment, where the first gap 902 is configured TO enable the first TO301 TO rotate around an axial line of the first TO301, and when the first TO301 rotates TO a different position, the first TO301 can rotate TO a different rotation position with respect TO the first through groove 502, for example, as shown in fig. 12a, the first TO301 rotates TO a first rotation position with respect TO the first through groove 502, so that a first polarization direction 1201 of a first optical signal emitted from the first TO301 is parallel TO a paper surface, and as shown in fig. 12b, the first TO301 rotates TO a second rotation position with respect TO the first through groove 502, so that a second polarization direction 1203 of the first optical signal emitted from the first TO301 is perpendicular TO the paper surface.

As can be seen, when the first TO301 is rotated TO different positions relative TO the first through groove 502, the first optical signal emitted from the first TO301 has different polarization directions, as shown in this embodiment, in the process of adjusting the first polarization direction of the first optical signal emitted from the first TO, the first TO301 located in the first through groove 502 can be rotated, so as TO change the first polarization direction of the first optical signal emitted from the first TO 301.

For a description of how the optical device in this embodiment realizes that the second TO505 can rotate freely, please refer TO a description of how the optical device realizes that the first TO301 can rotate freely, which is not described in detail herein.

As can be seen, with the structure of the optical module shown in this embodiment, the first polarization direction of the first optical signal emitted from the first TO301 and the second polarization direction of the second optical signal emitted from the second TO505 can be different from each other, so that the first optical signal and the second optical signal can be combined based on the polarization directions.

For example, it may be ensured that the first and second polarization directions are different from each other only by rotating the first TO301, or, for example, it may be ensured that the first and second polarization directions are different from each other only by rotating the second TO505, or, for example, it may be ensured that the first and second polarization directions are different from each other by rotating the first TO301 and the second TO 505.

The following describes a process of the optical assembly provided in this embodiment for multiplexing the first optical signal and the second optical signal:

with reference to fig. 3 to fig. 6, the wave combining module 500 shown in this embodiment further includes a wave combining tube 511, where the wave combining tube 511 shown in this embodiment has a first tube orifice and a second tube orifice, and in order to implement wave combining of two optical signals transmitted along different transmission directions, the first tube orifice and the second tube orifice shown in this embodiment are located at different side surfaces of the wave combining tube 511, so that the first optical signal transmitted along different transmission directions is transmitted to the inside of the wave combining tube 511 through the first tube orifice, and the second optical signal is transmitted to the inside of the wave combining tube 511 through the second tube orifice.

Specifically, the first nozzle shown in this embodiment is communicated with the first rotating ring 501, so that the first through slot 502 of the first rotating ring 501 is communicated with the wave combining tube 511, and as can be seen, the first optical signal emitted by the laser 603 is transmitted into the wave combining tube 511 through the first nozzle.

The second nozzle shown in this embodiment is in communication with the second rotating ring 504, so that the second through slot 508 of the second rotating ring 504 is in communication with the multiplexer 511, and it can be seen that the second optical signal emitted by the laser included in the second TO505 is transmitted into the multiplexer 511 through the second nozzle.

The combining process can also be seen in fig. 13, where fig. 13 is a diagram illustrating an example of the combining process for the first optical signal and the second optical signal provided in the present application.

The first optical filter 1302 is disposed inside the multiplexing tube 511, and the specific type of the first optical filter 1302 is not limited in this embodiment as long as the first optical filter 1302 can perform multiplexing based on two optical signals with different polarization directions, for example, the first optical filter 1302 shown in this embodiment may be a thin film polarizer or a wire grid polarizer.

In order to facilitate the first optical filter 1302 to multiplex the first optical signal 1301 and the second optical signal 1300, the first optical filter 1302 shown in this embodiment is located at a position where the first transmission direction of the first optical signal 1301 and the second transmission direction of the second optical signal 1300 intersect, and it is apparent that, when the first optical filter 1302 can receive the first optical signal 1301 and the second optical signal 1300, the first optical filter 1302 can multiplex the first optical signal 1301 and the second optical signal 1300.

Optionally, in this embodiment, an angle between the first optical filter 1302 and the extending direction of the optical fiber 1303 is 45 degrees, in this case, the extending direction of the first through slot 502 of the first rotating ring is perpendicular to the extending direction of the second through slot 508.

It should be clear that, in this embodiment, an explanation of an included angle between the extending direction of the first through slot 502 and the extending direction of the second through slot 508 is an optional example, and is not limited, as long as a first optical signal transmitted through the first through slot 502 and a second optical signal transmitted through the second through slot 508 can be transmitted to different surfaces of the first optical filter 1302, for example, as shown in fig. 13, the first optical signal 1301 is transmitted to a first surface 1304 of the first optical filter 1302, and the second optical signal 1300 is transmitted to a second surface 1305 of the first optical filter 1302, where the first surface 1304 and the second surface 1305 are two opposite side surfaces of the first optical filter 1302.

In order to improve the efficiency of coupling the first optical signal 1301 and the second optical signal 1300 to the optical fiber 1303 via the first optical filter 1302 and reduce the optical power loss during the coupling process, as shown in fig. 13, the first polarization direction 1311 of the first optical signal 1301 and the second polarization direction 1312 of the second optical signal 1300 are perpendicular to each other in this embodiment.

The first polarization direction 1311 shown in this embodiment is parallel to the polarization direction of the first optical filter 1302, and when the first optical signal 1301 is transmitted onto the first surface 1304 of the first optical filter 1302, the first optical signal 1301 is transmitted through the first optical filter 1302 to output the filtered first optical signal.

The second polarization direction 1312 is perpendicular to the polarization direction of the first optical filter 1302, and when the second optical signal 1300 is transmitted onto the second surface 1305 of the first optical filter 1302, the second optical signal 1300 is reflected by the first optical filter 1302 to output the filtered second optical signal.

In this embodiment, the filtered first optical signal has the first polarization direction, the filtered second optical signal has the second polarization direction, and the filtered first optical signal and the filtered second optical signal are transmitted along the same transmission direction to be coupled into the optical fiber 1303.

It should be clear that, in this embodiment, an example that the first polarization direction 1311 is parallel to the polarization direction of the first optical filter 1302 is used as an example, in other examples, an included angle between the first polarization direction 1311 and the polarization direction of the first optical filter 1302 may be within a first preset range, and the size of the first preset range is not limited in this embodiment as long as all or part of the optical power of the first optical signal 1301 is coupled into the optical fiber 1303 through transmission of the first optical filter 1302.

In this embodiment, an example is given that the second polarization direction 1312 is perpendicular to the polarization direction of the first optical filter 1302, in other examples, an included angle between the second polarization direction 1312 and the polarization direction of the first optical filter 1302 is within a second preset range, and the size of the second preset range is not limited in this embodiment as long as all or part of the optical power of the second optical signal 1300 is reflected by the first optical filter 1302 to be coupled into the optical fiber 1303.

Optionally, in this embodiment, in order TO realize the relative rotation between the first TO301 and the first rotating ring 501, and ensure that the structure between the first TO301 and the first rotating ring 501 is stable during the rotation process, so as TO avoid the situation that the first TO301 is separated from the first rotating ring 501, an inner peripheral wall of the first rotating ring 501 shown in this embodiment is concavely provided with a sliding groove, an outer peripheral wall of a TO pipe cap included in the first TO301 is convexly provided with a protruding rail, the protruding rail is inserted into the sliding groove, and the protruding rail is used for sliding along the guide of the sliding groove. It can be seen that, due TO the limiting effect of the sliding groove on the protruding rail on the first TO301 along the axial direction of the first TO, the first TO301 is effectively prevented from being separated from the first rotating ring 501, the stability of the optical assembly structure is improved, and for the description of how TO realize the relative rotation between the second TO and the second rotating ring, please see the description of the relative rotation between the first TO301 and the first rotating ring 501 in detail, which is not described in detail.

When the first TO301 is rotated TO a first target position, the first polarization direction emitted from the first TO301 is parallel TO the polarization direction of the first optical filter 1302, so as TO avoid that the subsequent first TO301 rotates continuously, and thus the first polarization direction is no longer parallel TO the polarization direction of the first optical filter 1302, the sliding groove shown in this embodiment is concavely provided with at least one clamping groove, the protruding rail is convexly provided with an elastic arm, when the TO pipe cap slides TO the first target position, the elastic arm is clamped and fixed in the target clamping groove, the target clamping groove is one of the at least one clamping groove, and thus, in the case that the elastic arm is clamped and fixed in the target clamping groove, even if the optical assembly shakes, the elastic arm cannot be separated from the target clamping groove, so that the first polarization direction of the first optical signal cannot be changed, the state in which the first polarization direction is parallel to the polarization direction of the first optical filter 1302 can be always ensured.

Optionally, the convex rail shown in this embodiment is recessed to form a first groove, a notch of the first groove is opposite to the slot arm of the sliding slot to form an accommodating space, the accommodating space includes at least one ball, and the ball is simultaneously in contact with the first groove and the slot arm of the sliding slot in a state where the convex rail slides along the guide of the sliding slot.

Due TO the sliding action of the balls, the efficiency of the relative rotation between the first TO301 and the first rotating ring 501 is improved, and the efficiency of adjusting the first polarization direction of the first optical signal emitted from the first TO301 is improved.

It can be seen that, with the structure of the optical module shown in this embodiment, the first polarization direction of the first optical signal can be changed by rotating the first TO, and/or the second polarization direction of the second optical signal can be changed by rotating the second TO, so as TO ensure that the first polarization direction and the second polarization direction can be different from each other, and the first optical filter can combine the first optical signal and the second optical signal based on the polarization directions. By adopting the wave combination mode shown in the embodiment, because wave combination is carried out based on the polarization direction, the wavelength of the first optical signal and the wavelength of the second optical signal are not required, namely, the interval between the wavelength of the first optical signal and the wavelength of the second optical signal can be very small or even the same, the application scene of the optical assembly shown in the embodiment is improved, the insertion loss in the wave combination process can be reduced, the performance of the optical assembly is improved, in the wave combination process, a polarization control element for changing the polarization direction is not required to be added, the complexity and the size of the structure of the optical assembly are effectively reduced, the process difficulty of manufacturing the optical assembly is reduced, the efficiency of producing the optical assembly is improved, and the cost is reduced.

Example two:

in the first embodiment, TO change the polarization direction of the first optical signal emitted from the first TO, the first TO can be rotated in the first through slot. The difference between the second embodiment and the first embodiment is that in the present embodiment, the polarization direction of the first optical signal emitted from the first TO is changed, and then the polarization direction can be changed by rotating the first through groove.

The optical assembly shown in this embodiment includes a wave combining module, the wave combining module shown in this embodiment includes a first rotating ring, and for a detailed description of the wave combining module, please refer to embodiment one for details, which is not described in detail in this embodiment.

The first rotating ring has a first through groove for being inserted inside the first TO, and it can be seen that the structures of the first TO and the first rotation shown in the present embodiment are different from those of the first embodiment, specifically, see fig. 14, in which fig. 14 shows an example of the structures of the first rotating ring and the first TO shown in the present embodiment in the second embodiment.

The first rotating ring 1401 shown in this embodiment includes a first end 1402 and a second end 1403, where the first end 1402 of the first rotating ring 1401 is an end of a first tube orifice of a back coupling wave tube, and for a description of the first tube orifice of the back coupling wave tube, please refer to embodiment one for details, and details are not described in this embodiment. The second end 1403 of the first rotating ring 1401 is the end against which the first nozzle abuts.

Specifically, the first end 1402 shown in this embodiment is provided with a laser 1404 accommodated inside the first rotating ring 1401 and used for emitting the first optical signal 1400, and details of the laser 1404 and the emitted first optical signal 1400 are shown in the first embodiment and are not described in detail in this embodiment.

The second end 1403 is provided with a lens 1405 for converging the first optical signal 1400, and for a detailed description of the lens 1405, please refer to embodiment one, which is not described in detail in this embodiment.

The first TO1406 shown in this embodiment is provided with a PIN 1407 for electrical connection with the laser 1404, and the cross-sectional area of the first TO1406 shown in this embodiment is smaller than that of the first rotating ring 1401 in the radial direction of the first TO1406, thereby ensuring that the outer peripheral wall 1408 of the first TO1406 is inserted into the inner peripheral wall 1409 of the first rotating ring 1401.

Under the condition that the outer peripheral wall 1408 of the first TO1406 is inserted into the inner peripheral wall 1409 of the first rotating ring 1401, the PIN 1407 included in the first TO1406 can supply power TO the laser 1404, so as TO ensure that the first optical signal emitted by the laser 1404 is converged by the lens 1405 and transmitted into the wave combining tube, which is described in detail in the first embodiment and not described in detail in this embodiment.

For a description of the specific structure of the second rotating ring shown in this embodiment, please refer TO the description of the structure of the first rotating ring in the first embodiment, and refer TO the description of the specific structure of the second TO in the first embodiment, which is not described in detail.

In this embodiment, in order to multiplex the first optical signal emitted from the first rotating ring 1401 and the second optical signal emitted from the second rotating ring, it is necessary that the first polarization direction of the first optical signal is different from the second polarization direction of the second optical signal.

It can be known that, in order TO change the first polarization direction TO ensure that the first polarization direction and the second polarization direction are different from each other, the first polarization direction of the first optical signal emitted from the first rotating ring can be changed by rotating the first rotating ring 1401 inserted inside the first TO1406 shown in this embodiment.

In order TO change the second polarization direction, so as TO ensure that the first polarization direction and the second polarization direction are different from each other, in this embodiment, the second polarization direction of the second optical signal emitted from the second rotating ring can be changed by rotating the second rotating ring inserted in the second TO.

The optical component shown in this embodiment further includes a first optical filter, where the first optical filter is used to combine the first optical signal and the second optical signal, and a detailed description of a combining process is given in the first embodiment, and is not specifically described in this embodiment.

EXAMPLE III

In the first embodiment and the second embodiment, the optical assembly is exemplarily illustrated by taking an example that the optical assembly includes two rotating rings and two TOs, the optical assembly shown in this embodiment is exemplarily illustrated by taking an example that the optical assembly includes three rotating rings and three TOs, in other examples, the optical assembly further includes more than three rotating rings and TOs, and detailed structures are not described again.

The structure of the optical assembly shown in this embodiment can be seen in fig. 15, specifically, the optical assembly shown in this embodiment includes a first rotating ring 1501 and a first TO1502 connected TO the first rotating ring 1501 in an inserting manner, and for the structural description of the first rotating ring 1501 and the first TO1502, reference is made TO the embodiment one or the embodiment two, which is not specifically described in detail in this embodiment.

The optical assembly shown in this embodiment includes a second through slot 1503 in communication with a third rotating ring 1504 and a fourth rotating ring 1505, respectively.

The third rotating ring 1504 has a third through slot for inserting the third TO1506, and the fourth rotating ring 1505 has a fourth through slot for inserting the fourth TO1507, and please refer TO the description of the structures of the third rotating ring 1504 and the third TO1506 and the structures of the fourth rotating ring 1505 and the fourth TO1507 in the above embodiment or the second embodiment, which is not repeated in this embodiment.

Specifically, a third gap exists between the third through groove of the third rotating ring 1504 and the outer peripheral wall of the third TO1506, and for the description of the third gap, please refer TO the description of the first gap in the first embodiment or the second embodiment, which is not repeated in this embodiment.

The third gap is configured TO enable the third TO1506 TO relatively rotate TO different rotation positions with respect TO the third through slot, so as TO change a third polarization direction of a third optical signal emitted from the third TO1506, please refer TO the description of the first optical signal in embodiment one for a specific description of the third optical signal, which is not described in detail in this embodiment.

A fourth gap exists between the fourth through groove of the fourth rotating ring 1505 and the fourth TO1507 in this embodiment, and for the description of the fourth gap, please refer TO the description of the first gap in the first embodiment or the second embodiment, which is not repeated in this embodiment.

The fourth gap is configured TO enable the fourth TO1507 TO relatively rotate TO a different rotation position with respect TO the fourth slot, so as TO change a fourth polarization direction of a fourth optical signal emitted from the fourth TO1507, for a specific description of the fourth optical signal, please refer TO the description of the first optical signal in the first embodiment, which is not described in detail in this embodiment.

For a description of the relationship between the third polarization direction and the fourth polarization direction in this embodiment, please refer to the description of the first polarization direction and the second polarization direction in the first embodiment, which is not repeated in this embodiment.

In the second through slot 1503 shown in this embodiment, a second optical filter is further included, where the second optical filter is located at a position where a transmission direction of the third optical signal and a transmission direction of the fourth optical signal intersect, for a specific description of the second optical filter, please refer to the description of the first optical filter shown in the first embodiment, which is not repeated in this embodiment.

The second optical filter is configured TO filter a third optical signal emitted from the third TO and a fourth optical signal emitted from the fourth TO, combine the third optical signal and the fourth optical signal filtered by the second optical filter TO form a second optical signal, and please refer TO embodiment one for a specific description of the second optical signal.

As can be seen from comparison between the first and third embodiments, the second optical signal in the first embodiment is the optical signal emitted from the second TO, and the second optical signal in the third embodiment is the third optical signal and the fourth optical signal combined by the second optical filter.

For a description of the second polarization direction of the second optical signal and a description of how to implement the multiplexing process of the first optical signal and the second optical signal, please refer to embodiment one for details, which is not described in detail in this embodiment.

Example four

In this embodiment, based on the optical assembly shown in the first embodiment, how to implement the process of accurately adjusting the first polarization direction and the second polarization direction is described, and several optional ways of optionally implementing accurate adjustment of the first polarization direction and the second polarization direction are described below:

mode 1:

in this embodiment, referring TO fig. 16, taking the first rotating ring 501 and the first TO301 as an example TO describe the precise adjustment process of the first polarization direction, please refer TO embodiment one for a description of specific structures of the first rotating ring 501 and the first TO301, which is not described in detail in this embodiment.

Specifically, according TO the present invention, in the radial direction of the first TO301, the cross-sectional area of the first through groove is smaller than that of the TO base, and therefore, in a state where the TO cap is inserted into the first through groove, the TO base is fixed TO the first through groove at a groove opening away from the wave combining tube in a clamping manner.

The side wall of the TO base is provided with the first indicator 1601, and the peripheral wall of the first rotating ring is provided with the at least one second indicator.

The first indication label 1601 can be a protrusion protruding from the external surface of the TO base, or a groove recessed from the external surface of the TO base, or a mark (e.g., an arrow-shaped mark shown in fig. 16) attached TO the external surface of the TO base, and is not limited in this embodiment, as long as the first indication label 1601 is disposed on the external surface of the TO base of the first TO301, and can be observed by the user.

The outer surface of the first rotating ring 501 is provided with at least one second indicating label, and please refer to the above description of the first indicating label for the description of the type of the second indicating label in this embodiment, which is not described in detail.

The present embodiment does not limit the number of second indicator labels, as long as the first optical signal has a different polarization direction in the case where the first indicator label 1601 is aligned with a different second indicator label in the axial direction of the first rotating ring 501.

For example, in the case where the first indicator tab 1601 and the second indicator tab 1602 are aligned along the axial direction of the first rotating ring 501, the first polarization direction is parallel to the polarization direction of the first optical filter, and for example, in the case where the first indicator tab 1601 and the second indicator tab 1603 are aligned along the axial direction of the first rotating ring 501, the first polarization direction forms an angle of 30 degrees with the polarization direction of the first optical filter, and the like, which is not limited in this embodiment.

For descriptions of the tags disposed on the second rotating ring and the second TO, please refer TO the descriptions of the tags disposed on the first rotating ring and the first TO in detail, which is not described in detail.

Mode 2:

the target second indicator label of the present embodiment may be configured to identify an angle value, and the target second indicator label may be configured to identify any one of a plurality of second indicator labels, specifically, the angle value identified by the target second indicator label is an angle between the first polarization direction of the first optical signal and the polarization direction of the first optical filter when the first indicator label is aligned with the target second indicator label, for example, the second indicator label 1602 described above may identify an angle value of "180 degrees", and further, the first polarization direction is parallel to the polarization direction of the first optical filter when the first indicator label 1601 and the second indicator label 1602 are aligned in the axial direction of the first rotary ring 501, and the second indicator label 1603 described above may identify an angle value of "30 degrees", and further, the first indicator label 1601 and the second indicator label 1603 are aligned in the axial direction of the first rotary ring 501 Under the condition of (1), an included angle of 30 degrees is formed between the first polarization direction and the polarization direction of the first optical filter.

Mode 3:

in embodiments 1 and 2, alignment is achieved by viewing the first indicator label and the second indicator label from the side, and alignment is achieved by viewing the first indicator label and the second indicator label from the top as shown in the present embodiment, which is specifically described below:

as shown in fig. 17 TO 19, the first through slot 1701 has a cross-sectional area greater than or equal TO that of the TO base 1702 in the radial direction of the first TO 1700.

In this way, a first indicator tab 1703 is located on a first surface 1705 of the lens 1704 of the TO base 1702 facing away from the first TO, and a second indicator tab is located on a second surface 1707 of the first rotating ring 1706;

as for the description of the type and alignment of the first indicator tab 1703 and the second indicator tab, see manner 1, the present embodiment is different from manner 1 in that the first indicator tab and the second indicator tab are aligned along the axial direction of the first TO in manner 1, and the first indicator tab and the second indicator tab are aligned along the radial direction of the first TO in this embodiment.

The first rotating ring 1706 shown in the present embodiment has the second surface 1707 and a third surface 1708, an outer peripheral surface of the first rotating ring 1706 is formed between the second surface 1707 and the third surface 1708, the second surface 1707 includes a first notch of the first through groove 1701, and the third surface 1708 includes a second notch of the first through groove 1701, the first notch and the second notch are communicated, wherein the second notch is communicated with the junction wave tube, and the TO tube cap is configured TO be inserted into the first through groove 1701 via the first notch.

It can be seen that, with the structure of the optical assembly shown in this embodiment, the purpose of accurately adjusting the first polarization direction and/or the second polarization direction can be achieved by aligning the first indication tag with the second indication tag, and in the process of specifically applying the optical assembly shown in this embodiment, the first polarization direction and/or the second polarization direction can be freely and accurately adjusted according to the requirement of the transmitted optical signal composite wave.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A wave combining module is characterized by comprising a first rotating ring with a first through groove, wherein the first through groove is used for inserting a first transistor outline TO, the first TO is used for emitting a first optical signal transmitted along a first transmission direction, the first through groove extends along the first transmission direction, the wave combining module further comprises a wave combining tube communicated with the first through groove, the wave combining tube is also communicated with a second through groove, a second optical signal transmitted along a second transmission direction is used for being transmitted into the wave combining tube through the second through groove, and the second through groove extends along the second transmission direction;

a first gap exists between the first through groove and the first TO, and the first gap is used for enabling the first TO rotate TO different rotation positions relative TO the first through groove, and when the first TO rotates TO different rotation positions relative TO the first through groove, the first optical signal emitted by the first TO has different polarization directions; wherein a first polarization direction of the first optical signal is different from a second polarization direction of the second optical signal, the first polarization direction is a polarization direction of the first optical signal when the first TO rotates TO a first target position within the first through slot, and the first target position is one of a plurality of different rotational positions at which the first TO relatively rotates with respect TO the first through slot;

the optical combiner further includes a first optical filter located at a position where the first transmission direction and the second transmission direction intersect, where the first optical filter is configured to filter the first optical signal to output a filtered first optical signal, where the first optical filter is configured to filter the second optical signal to output a filtered second optical signal, where the filtered first optical signal has the first polarization direction, the filtered second optical signal has the second polarization direction, and the filtered first optical signal and the filtered second optical signal are transmitted along the same transmission direction.

2. The wave combining module according TO claim 1, wherein the first TO comprises a TO base and a TO cap covering the TO base, a laser for emitting the first optical signal is fixedly arranged on the TO base, the TO cap is provided with a lens, and the first optical signal emitted by the laser is transmitted TO the wave combining tube through the lens;

the TO pipe cap is inserted into the first through groove and used for rotating in the first through groove; the external surface of the TO base is provided with a first indicator label, the external surface of the first rotating ring is provided with at least one second indicator label, and the first optical signal emitted from the lens has different polarization directions under the condition that the first indicator label is aligned with the different second indicator label;

wherein the first target position is a position at which the first indicator tab is aligned with a target second indicator tab, the target second indicator tab being one of the at least one second indicator tab.

3. The multiplexing module of claim 2, wherein the target second indicator tag is an angle value, and the angle value is an angle between the first polarization direction and a polarization direction of the first optical filter when the first indicator tag is aligned with the target second indicator tag.

4. The wave combining module according TO claim 2 or 3, characterized in that the cross-sectional area of the first through slot is greater than or equal TO the cross-sectional area of the TO base in a radial direction of the first TO, the first indicator label is located on a first surface of the TO base facing away from the lens, and the second indicator label is located on a second surface of the first rotating ring;

the first rotating ring is provided with the second surface and a third surface, the outer peripheral surface of the first rotating ring is formed between the second surface and the third surface, the second surface comprises a first notch of the first through groove, the third surface comprises a second notch of the first through groove, and the first notch and the second notch are communicated, wherein the second notch is communicated with the wave combining pipe, and the TO pipe cap is used for being inserted into the first through groove through the first notch;

the first target position is a position where the first indicator tab is aligned with the target second indicator tab in a radial direction of the first TO.

5. The wave combining module according TO claim 2 or 3, wherein a cross-sectional area of the first through groove is smaller than a cross-sectional area of the TO base in a radial direction of the first TO, and the TO base is fixedly held by the first through groove at a position away from a notch of the wave combining tube in a state where the TO cap is inserted into the first through groove;

the side wall of the TO base is provided with the first indicating label, and the peripheral wall of the first rotating ring is provided with the at least one second indicating label;

the first target position is a position where the first indicator tab is aligned with the target second indicator tab along an axial direction of the first TO.

6. The wave combining module according TO any one of claims 1 TO5, wherein a sliding groove is concavely formed on an inner peripheral wall of the first rotating ring, and a protruding rail is convexly formed on an outer peripheral wall of a TO cap included in the first TO, and is inserted into the sliding groove and is used for sliding along a guide of the sliding groove.

7. The wave combining module of claim 6, wherein the sliding groove is concavely provided with at least one retaining groove, and the convex rail is convexly provided with a resilient arm, wherein when the TO cap slides TO the first target position, the resilient arm is retained and fixed in a target retaining groove, and the target retaining groove is one of the at least one retaining grooves.

8. The wave combining module according to claim 6 or 7, wherein the concave portion of the convex rail forms a first groove, the notch of the first groove is opposite to the slot arm of the sliding slot to form an accommodating space, the accommodating space comprises at least one ball, and the ball abuts against the first groove and the slot arm of the sliding slot simultaneously in a state that the convex rail slides along the guide of the sliding slot.

9. The wave combining module according TO any one of claims 2 TO5, wherein a cross section of the TO cap is in a circular structure, a cross section of the first through groove is in a circular structure, and the TO cap and the first through groove are coaxially arranged.

10. The wave combining module according TO any one of claims 1 TO 9, further comprising a second rotating ring having the second through slot, the second through slot being used for inserting a second TO, the second TO being used for emitting the second optical signal;

a second gap exists between the second through slot and the second TO, and the second gap is used for enabling the second TO rotate relatively TO different rotation positions relative TO the second through slot, and when the second TO rotates TO different rotation positions relative TO the second through slot, the second optical signal emitted by the second TO has different polarization directions; wherein the second polarization direction is a polarization direction of the second optical signal when the second TO rotates TO a second target position within the second through-slot, and the second target position is one of a plurality of different rotational positions relative TO the second TO relative TO the second through-slot.

11. The wave combining module according TO any one of claims 1 TO 9, wherein the second through-groove communicates with a third rotating ring having a third through-groove for inserting a third TO and a fourth rotating ring having a fourth through-groove for inserting a fourth TO, respectively, a third gap being present between the third through-groove and a peripheral wall of the third TO, the third gap being used for relatively rotating the third TO a different rotational position with respect TO the third through-groove, a fourth gap being present between the fourth through-groove and the fourth TO, the fourth gap being used for relatively rotating the fourth TO a different rotational position with respect TO the fourth through-groove;

the second through groove further includes a second optical filter, the second optical filter is located at a position where a transmission direction of a third optical signal and a transmission direction of a fourth optical signal intersect, the third optical signal is an optical signal emitted from the third TO, the fourth optical signal is an optical signal emitted from the fourth TO, and the third optical signal and the fourth optical signal filtered by the second optical filter are combined TO form the second optical signal.

12. The combiner module of any of claims 1-11, wherein the first polarization direction is perpendicular to the second polarization direction, the first polarization direction is parallel to a polarization direction of the first optical filter, the first optical signal is transmitted through the first optical filter to output the filtered first optical signal, the second polarization direction is perpendicular to the polarization direction of the first optical filter, and the second optical signal is reflected through the first optical filter to output the filtered second optical signal.

13. The wave combining module according to claim 12, wherein an extending direction of the first through groove is perpendicular to an extending direction of the second through groove.

14. The wave combining module according to any one of claims 1 to 11, wherein an angle between the first polarization direction and the polarization direction of the first optical filter is within a first preset range, and an angle between the second polarization direction and the polarization direction of the first optical filter is within a second preset range.

15. An optical assembly comprising the wave-combining module of any one of claims 1 TO14, the optical assembly further comprising the first TO inserted in the first through slot included in the wave-combining module.